body,ul{
    margin: 0;
    padding: 0;
}
body{
    background-color: #ccc;
}
ul{
    list-style: none;
    background-color: #000;
}
button{
    margin-left: 900px;
    width: 100px;
    height: 40px;
}

.clic{
    width: 100px;
    height: 100px;
    background-color: #dfdfdf;
    border: 1px solid #000;
}